ISSN:
1439-6327
Keywords:
Metabolic type
;
Sheep muscle
;
Age relationships
;
Sex relationships
;
Glycolytic enzymes
;
LDH isoenzymes
;
Mitochondrial enzymes
;
ATPase
Source:
Springer Online Journal Archives 1860-2000
Topics:
Medicine
Notes:
Summary Myofibrillar ATPase activity (in the presence of Ca2+ and Mg2+), activities of various glycolytic and mitochondrial enzymes, and haemin iron, glycogen, ATP and lactic acid levels were determined in the heart and five skeletal muscles of the sheep as a function of age and sex. During growth from 2 to 13 months, ATPase activity remained stable whereas most mitochondrial and glycolytic activities tended to decrease, particularly betwen 2 and 6 months. The isoenzyme composition of lactic dehydrogenase evolued markedly, with in particular a rise in the percentage of M4. Haemin iron level rose from 6 months. These modifiations occurred in most of the skeletal muscles but rarely in the heart. Glycogen and ATP decreased progressively between 2 and 13 months. Overall, results indicated a regression of the metabolic differentiation among muscles between 2 and 13 months, particularly marked before 6 months. At 3 and 7 months, sex had practically no influence on the enzyme activities studied.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF02334068
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